You are 13. Even if you were had an otherkin soul, "awakening" of the spirit doesn't occur until late teenage years or early 20's, sometimes even later.
You're probably tired at night and awake during the day because your internal clock is messed up. It's a very common problem called insomnia and can be caused by stress.
As for sunlight, if you are dizzy or get headaches from it, you have light sensitivity. You should see your doctor because as you get older that could turn into full migraines and could be a sign of a blood disorder. I always have to wear sunglasses in direct light otherwise I can get terrible migraines. Your doctor can write a note to your gym teacher, allowing you to sit in the shade, wear a hat, or wear sunglasses to curb the problem.